Quote Originally Posted by Gerald C Koch View Post
Is there a particular reason you need ammonium thiosulfate? A rapid fixing bath can be made from sodium thiosulfate with the addition of either ammonium chloride or ammonium sulfate. Check the formulas for kodak F-7 or F-9.
Actually I've had good results with sodium thiosulfate so I guess I'll stick with it. It just seems that every time I look into it I keep reading that I should use ammonium thiosulphate instead: much faster etc. So I've just been keeping my eye out for it. I think I'll give up on that idea and do as you suggest and add ammonium chloride or sulphate.